oc·cul·ta·tion /ˌɑ(ˌ)kəlˈteʃən/
  掩蔽,消失,躲藏
  Oc·cul·ta·tion n.
  1. Astron. The hiding of a heavenly body from sight by the intervention of some other of the heavenly bodies; -- applied especially to eclipses of stars and planets by the moon, and to the eclipses of satellites of planets by their primaries.
  2. (Fig.:) The state of being occult.
     The reappearance of such an author after those long periods of occultation.   --Jeffrey.
  Circle of perpetual occultation. See under Circle.
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  occultation
       n : one celestial body obscures another [syn: eclipse]